193 lines
7.5 KiB
C
193 lines
7.5 KiB
C
/* $NetBSD: disk.h,v 1.16 2000/05/16 05:45:53 thorpej Exp $ */
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/*-
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
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*
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* @(#)disk.h 8.2 (Berkeley) 1/9/95
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*/
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#ifndef _SYS_DISK_H_
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#define _SYS_DISK_H_
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/*
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* Disk device structures.
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*/
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#include <sys/time.h>
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#include <sys/queue.h>
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struct buf;
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struct disklabel;
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struct cpu_disklabel;
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struct disk {
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TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
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char *dk_name; /* disk name */
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int dk_bopenmask; /* block devices open */
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int dk_copenmask; /* character devices open */
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int dk_openmask; /* composite (bopen|copen) */
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int dk_state; /* label state ### */
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int dk_blkshift; /* shift to convert DEV_BSIZE to blks */
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int dk_byteshift; /* shift to convert bytes to blks */
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/*
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* Metrics data; note that some metrics may have no meaning
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* on certain types of disks.
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*/
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int dk_busy; /* busy counter */
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u_int64_t dk_xfer; /* total number of transfers */
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u_int64_t dk_seek; /* total independent seek operations */
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u_int64_t dk_bytes; /* total bytes transfered */
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struct timeval dk_attachtime; /* time disk was attached */
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struct timeval dk_timestamp; /* timestamp of last unbusy */
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struct timeval dk_time; /* total time spent busy */
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struct dkdriver *dk_driver; /* pointer to driver */
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/*
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* Disk label information. Storage for the in-core disk label
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* must be dynamically allocated, otherwise the size of this
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* structure becomes machine-dependent.
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*/
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daddr_t dk_labelsector; /* sector containing label */
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struct disklabel *dk_label; /* label */
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struct cpu_disklabel *dk_cpulabel;
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};
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struct dkdriver {
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void (*d_strategy) __P((struct buf *));
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#ifdef notyet
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int (*d_open) __P((dev_t dev, int ifmt, int, struct proc *));
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int (*d_close) __P((dev_t dev, int, int ifmt, struct proc *));
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int (*d_ioctl) __P((dev_t dev, u_long cmd, caddr_t data, int fflag,
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struct proc *));
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int (*d_dump) __P((dev_t));
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void (*d_start) __P((struct buf *, daddr_t));
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int (*d_mklabel) __P((struct disk *));
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#endif
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};
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/* states */
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#define DK_CLOSED 0 /* drive is closed */
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#define DK_WANTOPEN 1 /* drive being opened */
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#define DK_WANTOPENRAW 2 /* drive being opened */
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#define DK_RDLABEL 3 /* label being read */
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#define DK_OPEN 4 /* label read, drive open */
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#define DK_OPENRAW 5 /* open without label */
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#ifdef DISKSORT_STATS
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/*
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* Stats from disksort().
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*/
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struct disksort_stats {
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long ds_newhead; /* # new queue heads created */
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long ds_newtail; /* # new queue tails created */
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long ds_midfirst; /* # insertions into sort list */
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long ds_endfirst; /* # insertions at end of sort list */
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long ds_newsecond; /* # inversions (2nd lists) created */
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long ds_midsecond; /* # insertions into 2nd list */
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long ds_endsecond; /* # insertions at end of 2nd list */
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};
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#endif
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/*
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* disklist_head is defined here so that user-land has access to it.
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*/
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TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
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#ifdef _KERNEL
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extern int disk_count; /* number of disks in global disklist */
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void disk_init __P((void));
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void disk_attach __P((struct disk *));
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void disk_detach __P((struct disk *));
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void disk_busy __P((struct disk *));
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void disk_unbusy __P((struct disk *, long));
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void disk_resetstat __P((struct disk *));
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struct disk *disk_find __P((char *));
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#ifdef __BROKEN_DK_ESTABLISH /* XXX DEPRECATED */
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struct device;
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void dk_establish __P((struct disk *, struct device *));
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#endif
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#endif
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#endif /* _SYS_DISK_H_ */
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